I'm An A Student, But You Only Gave Me a C

I get this from students fairly often; enough that I wrote a paper on how to turn such incidents into a more positive learning experience for the students: I'm An A Student, But You only Gave Me a 'C': Addressing Student Misconceptions of the Grading Process. The introduction provides some general strategies for reducing student confusion (and therefore complaints) but the best part is the section entitled "Sample Responses to Common Student Misunderstandings" that provides solutions for the most common (and annoying) student complaints.